CN216662547U - Concentrated processing system of waste water - Google Patents
Concentrated processing system of waste water Download PDFInfo
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- CN216662547U CN216662547U CN202020969774.6U CN202020969774U CN216662547U CN 216662547 U CN216662547 U CN 216662547U CN 202020969774 U CN202020969774 U CN 202020969774U CN 216662547 U CN216662547 U CN 216662547U
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Abstract
A wastewater concentration treatment system, the wastewater concentration treatment system comprising: the system comprises a first boiler system, a concentration tower, a booster fan, a waste water heater and a circulating pump. The waste water concentration treatment system scientifically combines the waste water concentration by using the waste heat of the flue gas and the waste water heating and evaporation by using the waste heat of the system, and fully utilizes the existing equipment and conditions (chimney vacuumizing) by combining the operation mode of an enterprise, thereby greatly improving the output of the waste water concentration system, reducing the operation energy consumption, reducing the investment, reducing the space occupation, and having flexible operation mode and adaptability.
Description
Technical Field
The utility model relates to the technical field of environmental protection, in particular to a system for concentrating and treating wastewater.
Background
In a zero-emission wastewater treatment process, it is often necessary to concentrate the wastewater for subsequent treatment. The waste water is concentrated by using the low-temperature flue gas of the boiler, the waste heat of the flue gas can be fully utilized, the flue gas is primarily purified, and the method has important significance for energy conservation, emission reduction and environmental protection.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel wastewater concentration treatment device. The device has the advantages of high concentration capacity and output, low operation energy consumption, small occupied space, flexible operation mode and low capital investment.
Therefore, the utility model provides a flue gas wastewater concentration treatment system, which is characterized by comprising the following components: the system comprises a first boiler system, a concentration tower, a booster fan, a wastewater heater and one or more circulating pumps (preferably arranged in series when a plurality of circulating pumps are arranged); the first boiler system includes: the device comprises a hearth, an air preheater, a dust remover, an induced draft fan, a desulfurizing tower and a chimney which are sequentially connected through a flue; a spraying device is arranged in the concentration tower, and a wastewater tower pool is arranged below the concentration tower; a tower body of the concentration tower is provided with a flue gas inlet, a flue gas outlet, a waste water inlet and a waste water outlet; the flue gas inlet is arranged between the spraying device and the wastewater tower pool, the flue gas outlet is arranged above the spraying device, and the flue gas outlet is communicated with a flue of the first boiler system through a bypass flue; the wastewater outlet is communicated with the wastewater tower pool; an outlet of the booster fan is communicated with a flue gas inlet of the concentration tower, an inlet of the booster fan is communicated with a flue between the hearth of the first boiler system and the desulfurization tower, and a first inlet baffle valve is arranged on a bypass flue communicated with the flue of the first boiler system; the connection point of the flue gas outlet and the flue of the first boiler system is positioned on the flue between the connection point of the inlet of the booster fan and the flue of the boiler and the inlet of the desulfurizing tower; the inlet of the booster fan is also communicated with the atmosphere through a second inlet baffle valve; the waste water tower pool is also provided with a waste water circulating outlet, the inlet of the circulating pump or circulating pumps is communicated with the waste water circulating outlet, and the outlet of the circulating pump is communicated with the spraying device; the waste water heater is connected in series on the inlet pipeline or the outlet pipeline of at least one circulating pump.
Optionally, the inlet of the booster fan is connected with the flue between the air preheater and the desulfurizing tower through a bypass flue.
Optionally, an inlet of the booster fan is communicated with any position on the flue between the induced draft fan and the desulfurizing tower through a bypass flue. The flue gas that waste water concentration used derives from behind the draught fan of first boiler system, this get a flue gas temperature than before the dust remover flue gas temperature is low, the grade is low, and the usable value is little, is favorable to utilizing the draught fan to do work the flue gas heat of the conversion that generates heat simultaneously.
Optionally, the flue gas wastewater concentration treatment system further comprises a second boiler system; the waste water heater comprises a low-temperature channel and a high-temperature channel, the low-temperature channel is a waste water channel for waste water circulation, the high-temperature channel is a heating medium channel for heating medium circulation, and the heating medium comes from the second boiler system.
Optionally, the heating medium is derived from flue gas of the second boiler system, namely flue gas in a flue between a furnace outlet of the second boiler system and a chimney; alternatively, the heating medium is derived from a heating medium heated by flue gas of the second boiler system, such as hot water or steam; or the heating medium is derived from extraction steam or condensed water (including hydrophobic water after extraction steam is condensed) of a steam turbine system matched with the second boiler system; alternatively, the heating medium is derived from a heating medium such as hot water heated by extraction or condensation water (including hydrophobic water after extraction condensation) of a steam turbine system associated with the second boiler system.
Optionally, a first outlet baffle valve is arranged on a bypass flue of the concentration tower, wherein the flue gas outlet of the concentration tower is communicated with an inlet flue of the desulfurization tower, and the flue gas outlet of the concentration tower is communicated with a flue between an outlet of the desulfurization tower and a chimney through the bypass flue and a second outlet baffle valve.
Optionally, a demister is further disposed between the spraying device and the flue gas outlet in the concentration tower. It can reduce the mechanical carrying of the exhausted flue gas to the waste water.
Optionally, the wastewater inlet is located on any channel on the thickening tower body that communicates with the inside of the thickening tower.
Optionally, the waste water inlet is located on a pipe in communication with the spray device.
Optionally, the waste water outlet is located on a pipeline on the concentrating tower body and communicated with the waste water circulating outlet.
Optionally, a wastewater diversion device is arranged between the wastewater tower pool and the flue gas inlet in the concentration tower, and the wastewater diversion device is of a structure with a large top and a small bottom, preferably an inverted cone-shaped structure; the upper opening of the wastewater diversion device is used for receiving wastewater sprayed by the spraying device, the lower opening of the wastewater diversion device is communicated to the lower position of the wastewater tower pool, and the wastewater circulation outlet is positioned at the upper position of the wastewater tower pool.
Preferably, in order to make the wastewater circulating pump operate stably, a wastewater buffer tank is arranged between the wastewater circulating outlet and the circulating pump. The wastewater buffer tank may be disposed below or outside the wastewater tower basin.
The concentration tower can adopt an upper and lower split structure, the part above the wastewater tower pool and the wastewater tower pool of the concentration tower are separately arranged, and the upper part and the lower part are communicated.
The wastewater inlet of the concentration tower can be an opening on the tower body wall of the concentration tower, and incoming wastewater is directly input into the concentration tower through the opening. Or on a channel or device (such as a wastewater circulation line, a demister flushing line, or other means) in communication with the interior of the thickening tower, so long as incoming wastewater can be fed into the interior of the thickening tower and ultimately into the tank inlet.
Optionally, the flue gas inlets are two or more; optionally, a second spraying device is arranged at the flue gas inlet, and incoming wastewater enters the concentration tower through the second spraying device. Therefore, the air inlet of the concentration tower is uniform, the efficiency is improved, and bias flow and wall flow are reduced.
The waste water outlet can be an opening on the wall of the tower body, which enables waste water to be directly discharged from the tower pool, or a discharge port on a channel communicated with the tower pool, as long as the waste water outlet can discharge the concentrated waste water out of the concentrating tower.
In the present invention, the term "communication" may be direct communication or indirect communication, according to specific needs.
The flue gas wastewater concentration treatment system can realize the following operation modes:
(1) when the first boiler system operates, the concentration tower introduces low-temperature flue gas behind an air preheater of the boiler system, and waste water is heated and concentrated by using the waste heat of the low-temperature flue gas, so that the operation energy consumption of waste water concentration can be reduced.
(2) When the first boiler system operates, the concentration tower introduces low-temperature flue gas behind an air preheater of the boiler system, meanwhile, the waste water heater is started, and the waste water is heated by using the heat medium from the boiler system, so that the evaporation capacity and the output of the concentration tower can be improved, and the equipment investment is reduced.
(3) When the flue gas wastewater concentration treatment system comprises a first boiler system and a second boiler system, and the first boiler system is stopped, the wastewater heater is started, the heating medium from the second boiler system is used for heating wastewater, and the chimney is used for vacuumizing the concentration tower. And the wastewater heated by the wastewater heater is sprayed into the concentration tower through the spraying device, and the wastewater is expanded, depressurized and evaporated so as to be concentrated. The existing system can be fully utilized to reduce investment and energy consumption;
(4) when the flue gas wastewater concentration treatment system comprises a first boiler system and a second boiler system, and the first boiler system stops running, starting a wastewater heater, and heating wastewater by using a heat medium from the second boiler system; and simultaneously starting the booster fan, starting a second inlet baffle valve, feeding unsaturated water vapor air into the concentration tower, and improving the output of the concentration tower by using the vacuumizing action of the chimney.
Advantageous effects
Due to the lower energy of the low temperature flue gas, the required flue interface is large, and it is often difficult to implement two or more boilers connected to one concentrating tower. That is, it is generally possible to make only one furnace and one tower (concentrating tower). Several boilers are needed, and several concentration towers and their associated systems are needed. This not only makes space difficult to arrange, but also makes the investment large. Moreover, each boiler may be shut down for maintenance, which may result in the waste water concentration system also not being able to operate. The flue gas wastewater concentration treatment system is provided with a wastewater heater matching device, and can realize a one-tower multi-furnace system by associating the heater with another boiler system.
The waste water concentration treatment system scientifically combines the waste water concentration by using the waste heat of the flue gas and the waste water heating and evaporation by using the waste heat of the system, and fully utilizes the existing equipment and self-heating conditions (chimney vacuumization) by combining the operation mode of an enterprise, thereby greatly improving the output of the waste water concentration system, reducing the operation energy consumption, reducing the investment and the space occupation, and having flexible operation mode and adaptability. When the boiler is stopped, the flue gas wastewater concentration treatment system can still normally operate.
Drawings
FIG. 1 is a schematic configuration diagram of an embodiment of a wastewater concentration treatment system according to the present invention;
FIG. 2 is a temperature and humidity diagram of a flue gas thermodynamic process in operation of one embodiment of the wastewater concentration treatment system of the present invention;
FIG. 3 is a schematic structural view of another embodiment of the wastewater concentration treatment system according to the present invention;
FIG. 4 is a temperature and humidity diagram of a flue gas thermodynamic process of another embodiment of the wastewater concentration treatment system of the present invention during operation;
FIG. 5 is a schematic configuration diagram of another embodiment of the wastewater concentration treatment system according to the present invention.
In the figure: the system comprises a first boiler system I, a hearth I-1, an air preheater I-2, a dust remover I-3, an induced draft fan I-4, a desulfurizing tower I-5, a chimney I-6, a concentration tower 1, a booster fan 2, a wastewater heater 3, a circulating pump 4, a spraying device 5, a wastewater tower pool 6, a flue gas inlet 7, a flue gas outlet 8, a wastewater circulating outlet 9, a wastewater inlet 10, a wastewater outlet 11, a first inlet baffle valve 12, a second inlet baffle valve 13, a first outlet baffle valve 14, a second outlet baffle valve 15, a demister 16, a wastewater diversion device 17 and a wastewater buffer tank 18.
Detailed Description
FIG. 1 is a schematic configuration diagram of an embodiment of a wastewater concentration treatment system according to the present invention. As shown in fig. 1, the flue gas wastewater concentration treatment system comprises: a first boiler system I, a thickening tower 1; a booster fan 2, a waste water heater 3 and a circulating pump 4; the first boiler system I comprises: the device comprises a hearth I-1, an air preheater I-2, a dust remover I-3, an induced draft fan I-4, a desulfurizing tower I-5 and a chimney I-6 which are sequentially connected through a flue; a spray device 5 and a wastewater tower pool 6 for storing wastewater are sequentially arranged in the concentration tower 1 from top to bottom, a flue gas inlet 7 is arranged between the spray device 5 and the wastewater tower pool 6 on the tower body of the concentration tower 1, a flue gas outlet 8 is arranged above the spray device 5, and a wastewater circulating outlet 9 is arranged on the wastewater tower pool 6; the circulating pump 4 is connected between the spraying device 5 and the wastewater circulating outlet 9 through a wastewater circulating pipe, and the outlet or the inlet of the circulating pump 4 is connected with a wastewater heater 3 in series; the concentration tower 1 is provided with a wastewater inlet 10 for inputting incoming wastewater; the wastewater tower pool 6 is provided with a wastewater outlet 11 for discharging the concentrated wastewater out of the concentration tower 1; the outlet of the booster fan 2 is communicated with the flue gas inlet 7 of the concentration tower 1, and the inlet of the booster fan 2 is communicated with a flue between the induced draft fan I-4 of the first boiler system I and the desulfurizing tower I-5 through a bypass flue; a first inlet baffle valve 12 is arranged on a bypass flue communicated with the flue of the first boiler system I at the inlet of the booster fan 2; the connection point of the flue gas outlet 8 and the flue of the first boiler system I is positioned on the flue between the connection point of the inlet of the booster fan 2 and the flue of the boiler and the inlet of the desulfurizing tower I-5; the waste water heater 3 is provided with a low-temperature channel and a high-temperature channel, the low-temperature channel is a waste water channel for circulating waste water to circulate, the high-temperature channel is a heating medium channel for circulating a heating medium, and the heating medium is derived from a boiler system.
Considering that when the first boiler system I is stopped, the inside of a flue of the first boiler system I may have maintenance work, and in order to avoid the influence of air suction of the booster fan 2 on the maintenance work, a second inlet baffle valve 13 is further arranged at the inlet of the booster fan, and the inlet of the booster fan can be communicated with the atmosphere through the second inlet baffle valve 13. When the first boiler system I is shut down and the flue is overhauled, the first inlet baffle valve 12 is closed, the second inlet baffle valve 13 is opened, the influence of the booster fan 2 for sucking air on the overhauling work is avoided, and the normal operation of the concentration tower 1 is ensured.
The flue gas outlet 8 of the concentration tower 1 is communicated with the inlet flue of the desulfurizing tower I-5 through a bypass flue; and a first outlet baffle valve 14 is arranged on a bypass flue communicated with the flue gas outlet 8 of the concentration tower 1 and the inlet flue of the desulfurizing tower I-5.
And the communication point of the flue gas outlet 8 of the concentration tower 1 and the inlet flue of the desulfurizing tower I-5 is positioned on the flue position between the communication point of the inlet of the booster fan and the boiler flue and the inlet of the desulfurizing tower.
The working process of the flue gas wastewater concentration treatment system is as follows:
incoming wastewater enters the wastewater tower pool 6 in the concentration tower 1 through the wastewater inlet 10 and flows into the spraying device 5 under the driving of the circulating pump 4, and the spraying device 5 atomizes the wastewater and sprays the wastewater in the concentration tower 1 to flow downwards; flue gas from first boiler system I through bypass flue with first entry damper valve 12 booster fan 2 with flue gas entry 7 gets into in the concentration tower 1 to upwards flow through spray set 5, the flue gas with waste water is in heat transfer against the current in the concentration tower 1, waste water part is evaporated and is sneaked into the flue gas, flue gas humidity increases and carries the flue gas process that water is thoughtlessly had vapor flue gas export 8 with first export baffle 14 flows out the concentration tower 1 and gets into desulfurizing tower I-5 is to chimney I-6, waste water is because of partial evaporation concentration decrement, falls into downwards waste water tower pond 6. Under the drive of the circulating pump 4, the wastewater is circularly concentrated for multiple times, the concentration is higher and higher, the quantity is less and less, and when the wastewater reaches a certain concentration, the wastewater is discharged out of the concentrating tower 1 through the wastewater outlet 11 and enters a wastewater tail end treatment system until zero discharge.
In order to increase the output of the concentration tower 1, the waste water heater 3 may be activated to heat waste water with a heating medium originating from a boiler system.
In this embodiment, the booster fan 2 and the first boiler system I are communicated behind the induced draft fan I-4, that is, the flue gas generated by the concentration of the wastewater comes from behind the induced draft fan I-4 of the first boiler system I, and the flue gas temperature at the point taking is lower than that before the dust remover, the grade is low, the available value is low, and the flue gas heat generated by the heat generation and conversion of the induced draft fan I-4 is also favorably utilized. Of course, the flue gas taking point can also be arranged in front of the dust remover.
Fig. 2 is a temperature-humidity diagram of the thermodynamic process. As shown in fig. 2, the flue gas entering the flue gas inlet 7 of the concentration tower 1 is superheated flue gas, and the state point is a. Exchanging heat with the wastewater in the concentration tower to reach a water vapor saturation state point B, wherein the humidity is d0Increase to d1. The increase of the humidity of the flue gas means that the concentration and decrement of the waste water are d1-d0(ii) a The temperature of the wastewater is increased under the action of the wastewater heater, the smoke state point is from B to C, namely the humidity of the smoke is increased, and the concentration and decrement of the wastewater are d2-d1. Finally, under the dual functions of flue gas evaporation and waste water heating, the humidity of the flue gas is increased, namely the waste water is concentrated and reduced to d2-d0The output of the thickening tower increases.
Fig. 3 is a schematic configuration view showing another embodiment of the wastewater concentration treatment system according to the present invention, which, as shown in fig. 3, further includes: a second boiler system II. The heating medium of the waste water heater 3 may originate from the second boiler system II.
The heating medium can be derived from flue gas of a second boiler system II, namely flue gas in a flue between a hearth outlet of the second boiler system II and a chimney is used as the heating medium of the high-temperature channel of the wastewater heater;
or the heating medium is derived from hot water or steam heated by the flue gas of the second boiler system II, namely, an intermediate medium hot water (or steam) system is arranged, the flue gas of the second boiler system II is used for heating the intermediate medium hot water (or steam), and the intermediate medium hot water (or steam) is used as the heating medium of the high-temperature channel of the wastewater heater;
alternatively, the heating medium is derived from the extraction or condensation water (including the hydrophobic water after extraction and condensation) of the steam turbine system associated with the second boiler system II, which has a problem of polluting the steam turbine system once the waste water heater leaks;
or, the heating medium is derived from the heating medium heated by the extraction steam or the condensed water (including the drainage steam after extraction steam condensation) of the steam turbine system matched with the second boiler system II, that is, an intermediate heating medium water system is arranged, the extraction steam or the condensed water (including the drainage steam after extraction steam condensation) of the steam turbine system matched with the second boiler system II is used for heating the intermediate heating medium water, and then the intermediate heating medium water is used as the heating medium of the high-temperature channel of the wastewater heater 3.
The second boiler system II is not affected by whether the first boiler system I is operated or not, and when the first boiler system I is stopped, if the second boiler system II is in an operating state, a heating medium can be provided for the wastewater heater 3 so as to keep the concentration tower 1 still having a certain wastewater concentration capability.
If the second boiler system II is not provided with the help of the waste water heater 3, the problem will arise that when the first boiler system I is shut down, the concentration tower 1 has neither flue gas nor heating medium required by the waste water heater 3, and the concentration tower 1 can only be shut down, i.e. a furnace-tower unit system must be built, increasing investment and space occupation.
Of course, the waste water heater 3 may also use a heating medium originating from the first boiler system I in normal operation.
When the first boiler system 1 is shut down, the wastewater concentration system operates in the following manner:
(1) starting a waste water heater 3, heating waste water by using a heating medium from a second boiler system II, vacuumizing the concentration tower 1 by using the chimney I-6, spraying the waste water heated and heated in the waste water heater 3 into the concentration tower 1 through the spraying device 5, expanding the volume and reducing the pressure, evaporating the waste water due to the reduction of the saturation temperature, namely evaporating, and allowing the steam to flow out of the concentration tower 1 under the suction action of the chimney I-6 so as to concentrate the waste water. Thus, the existing system can be fully utilized to reduce investment and energy consumption;
or (2) starting the wastewater heater 3, and heating the wastewater by using the heat medium from the second boiler system II; and simultaneously starting the booster fan 2, feeding unsaturated water vapor air into the concentration tower 1, and improving the output of the concentration tower 1 by utilizing the vacuumizing action of the chimney I-6. The thermodynamic process is shown in a temperature-humidity diagram 4. The air entering the flue gas inlet 7 of the concentration tower 1 has a state point A, exchanges heat with the wastewater in the concentration tower 1 and reaches a saturation state point B, and the humidity of the air is controlled by d0Increase to d1，The humidity is increased, namely the waste water is concentrated and reduced to d1-d0(ii) a The temperature of the wastewater is increased under the action of the wastewater heater 3, the air state point is from B to C, namely, the air humidity is increased, namely, the concentration and decrement of the wastewater are d2-d1. Finally, under the dual functions of air evaporation and waste water heating, the air humidity is increased, namely the waste water is concentrated and reduced to d2-d0The concentration tower 1 can maintain a certain concentration amount. Because the first boiler system I is shut down at this time, the wastewater treatment capacity requirement is reduced, so that the wastewater concentration system can still maintain the operation and meet the requirement of wastewater concentration treatment.
Fig. 5 shows a schematic configuration of another embodiment of the present invention. Considering that the desulfurization tower I-5 is sometimes overhauled when the first boiler system I is shut down, in order to avoid the exhaust gas (steam) of the concentration tower 1 entering the desulfurization tower I-5 to affect the overhauling work, the flue gas outlet 8 of the concentration tower 1 is communicated with the flue between the outlet of the desulfurization tower I-5 and the chimney I-6 through a bypass flue and a second outlet baffle valve 15 (in order to avoid the backflow into the desulfurization tower I-5, the communication point is as close to the inlet of the chimney I-6 as possible). The method has the function that when the first boiler system I is shut down and the desulfurizing tower I-5 is overhauled, the exhaust (steam) of the flue gas outlet 8 of the concentrating tower 1 does not enter the desulfurizing tower I-5 and directly enters the chimney I-6 by closing the first outlet baffle valve 14 and opening the second outlet baffle valve 15.
In another embodiment of the present invention, as shown in fig. 5, a demister 16 is arranged inside the concentration tower 1 between the spraying device 5 and the flue gas outlet 8, and functions to reduce the mechanical entrainment of the waste water by the exhaust gas.
The wastewater inlet 10 may be located on any channel on the concentrating tower body, which is communicated with the interior of the concentrating tower, for example, on a channel of spray water of a demister, as long as incoming wastewater can be fed into the concentrating tower 1, or may be located on a circulating pipeline communicated with the spraying device 5, for example, incoming wastewater may be connected to an inlet or outlet pipeline of the circulating pump 4.
The waste water outlet 11 may be located on a pipe on the thickening tower body which communicates with the waste water recycling outlet 9.
In another embodiment of the present invention, as shown in fig. 5, a wastewater diversion device 17 is disposed between the wastewater tower 6 and the flue gas inlet, the wastewater diversion device 17 is an inverted cone structure with a large upper part and a small lower part, an upper opening of the wastewater diversion device 17 is used for receiving wastewater sprayed from the spraying device 5, and a lower opening thereof is introduced into a lower part of the wastewater tower 6; the lower part of the wastewater tower pool 6 is communicated with the wastewater outlet 11; the upper part of the wastewater tower pool 6 is communicated with the wastewater circulating outlet 9. The wastewater diversion device 17 receives wastewater which flows down and is concentrated from the upper part of the concentration tower 1, and flows into the wastewater tower pool 6 at the lower opening thereof, and due to the small flow velocity and the large flow velocity of the cone opening, particles with large specific gravity in the concentrated wastewater are flushed to the lower part of the wastewater tower pool 6 under the dual action of water flow power and particle gravity, and are discharged out of the concentration tower 1 through the wastewater outlet 11 to enter the next treatment link. The wastewater with lower concentration of particulate matters flows upwards to the upper part of the wastewater tower 6 and enters the circulating pump 4 and the spraying device 5 through the wastewater circulating outlet 9 for circulating spraying and concentration. Thereby realizing the separation of the particulate matters.
In another embodiment of the present invention, in view of the stable operation of the circulation pump, as shown in fig. 5, a waste water buffer tank 18 is disposed between the waste water circulation outlet 9 and the circulation pump 4, and the waste water buffer tank 18 is disposed below or outside the waste water tower 6, in this embodiment, below.
The concentration tower 1 can be integrated or be in a split structure, that is, the part above the wastewater tower pool 6 of the concentration tower 1 and the wastewater tower pool 6 are separately provided with an upper part and a lower part which are communicated. Not shown in the figures.
The flue gas inlet 7 can be provided with two or more than two, so that the air inlet of the concentration tower 1 is uniform, the efficiency is improved, and the bias flow and the wall flow are reduced. Not shown in the figures.
In another embodiment of the present invention, as shown in fig. 5, a second spraying device 19 is disposed at the wastewater inlet 10, and the incoming wastewater enters the concentrating tower 1 through the second spraying device 19.
It will be appreciated by those skilled in the art that although the present invention has been described in terms of a number of separate embodiments, the features referred to in the various embodiments may be combined with each other.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of the utility model shall fall within the scope of the utility model.
Claims (14)
1. A wastewater concentration treatment system, comprising: the system comprises a first boiler system, a concentration tower, a booster fan, a wastewater heater and one or more circulating pumps; the first boiler system includes: the device comprises a hearth, an air preheater, a dust remover, an induced draft fan, a desulfurizing tower and a chimney which are sequentially connected through a flue; a spraying device is arranged in the concentration tower, and a wastewater tower pool is arranged below the concentration tower; a tower body of the concentration tower is provided with a flue gas inlet, a flue gas outlet, a waste water inlet and a waste water outlet; the flue gas inlet is arranged between the spraying device and the wastewater tower pool, the flue gas outlet is arranged above the spraying device, and the flue gas outlet is communicated with a flue of the first boiler system through a bypass flue; the wastewater outlet is communicated with the wastewater tower pool; an outlet of the booster fan is communicated with a flue gas inlet of the concentration tower, an inlet of the booster fan is communicated with a flue between the hearth of the first boiler system and the desulfurization tower through a bypass flue, and a first inlet baffle valve is arranged on the bypass flue through which the inlet of the booster fan is communicated with the flue of the first boiler system; the connection point of the flue gas outlet and the flue of the first boiler system is positioned on the flue between the connection point of the inlet of the booster fan and the flue of the boiler and the inlet of the desulfurizing tower; the inlet of the booster fan is also communicated with the atmosphere through a second inlet baffle valve; the waste water tower pool is also provided with a waste water circulating outlet, the inlet of the circulating pump or circulating pumps is communicated with the waste water circulating outlet, and the outlet of the circulating pump is communicated with the spraying device; the waste water heater is connected in series on the inlet pipeline or the outlet pipeline of at least one circulating pump.
2. The wastewater concentration treatment system according to claim 1, wherein the inlet of the booster fan is connected with the flue between the induced draft fan and the desulfurizing tower through a bypass flue.
3. The wastewater concentration treatment system of claim 1, further comprising a second boiler system; the waste water heater comprises a low-temperature channel and a high-temperature channel, the low-temperature channel is a waste water channel for waste water circulation, the high-temperature channel is a heating medium channel for heating medium circulation, and the heating medium is derived from the second boiler system.
4. The wastewater concentration treatment system according to claim 3, wherein the heating medium is derived from flue gas in a flue between a furnace outlet of the second boiler system and a chimney; alternatively, the heating medium is derived from a heating medium heated by flue gas of the second boiler system; or the heating medium is derived from extracted steam or condensed water of a steam turbine system matched with the second boiler system; alternatively, the heating medium is derived from a heating medium heated by extraction steam or condensed water of a steam turbine system associated with the second boiler system.
5. The wastewater concentration treatment system according to claim 1, wherein a first outlet baffle valve is arranged on a bypass flue of the concentration tower, the flue gas outlet of which is communicated with the inlet flue of the desulfurization tower, and the flue gas outlet of the concentration tower is also communicated with the flue between the outlet of the desulfurization tower and a chimney through the bypass flue and a second outlet baffle valve.
6. The wastewater concentration treatment system according to claim 1, wherein a demister is further disposed between the spray device and the flue gas outlet in the concentration tower.
7. The wastewater treatment system according to any of claims 1 to 6, wherein the wastewater inlet is located on any passage on the body of the thickening tower that communicates with the interior of the thickening tower.
8. The wastewater concentration treatment system according to any one of claims 1 to 6, wherein said wastewater inlet is located on a pipe communicating with said spray means.
9. The wastewater concentration treatment system according to any one of claims 1 to 6, wherein the wastewater outlet is located on a pipe on the concentrating tower body which is communicated with the wastewater circulation outlet.
10. The wastewater concentration treatment system according to any one of claims 1 to 6, wherein a wastewater diversion device is arranged between the wastewater tower pool and the flue gas inlet in the concentration tower, and the wastewater diversion device is of a structure with a large upper part and a small lower part; the upper opening of the wastewater diversion device is used for receiving wastewater sprayed by the spraying device, the lower opening of the wastewater diversion device is communicated to the lower position of the wastewater tower pool, and the wastewater circulation outlet is positioned at the upper position of the wastewater tower pool.
11. The wastewater concentration treatment system according to claim 10, wherein the wastewater diversion device is an inverted cone structure with a large upper part and a small lower part.
12. The wastewater concentration treatment system according to any one of claims 1 to 6, wherein a wastewater buffer tank is provided between the wastewater circulation outlet and the circulation pump.
13. The wastewater concentration treatment system according to any one of claims 1 to 6, wherein a second spraying device is arranged at the flue gas inlet, and incoming wastewater enters the concentration tower through the second spraying device.
14. The wastewater treatment system of any of claims 1-6 wherein the communication is direct or indirect.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019109954997 | 2019-10-18 | ||
| CN201921756133 | 2019-10-18 | ||
| CN201910995499 | 2019-10-18 | ||
| CN2019217561336 | 2019-10-18 |
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| CN216662547U true CN216662547U (en) | 2022-06-03 |
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| CN201921782925.0U Active CN211921172U (en) | 2019-10-18 | 2019-10-23 | Concentrated processing system of waste water |
| CN202020969774.6U Active CN216662547U (en) | 2019-10-18 | 2020-06-01 | Concentrated processing system of waste water |
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| CN201921782925.0U Active CN211921172U (en) | 2019-10-18 | 2019-10-23 | Concentrated processing system of waste water |
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| CN (2) | CN211921172U (en) |
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2019
- 2019-10-23 CN CN201921782925.0U patent/CN211921172U/en active Active
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| CN211921172U (en) | 2020-11-13 |
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